JP3085881B2 - Multi-slide mechanical press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-slide mechanical press having a plurality of slides, and can be used for a guide mechanism for each slide and a screw lock mechanism for adjusting a slide for adjusting the position of a pressure receiving plate for mounting an upper die. .

[0002]

2. Description of the Related Art In the prior art, a slide of a mechanical press generally uses a rectangular guide for guiding the vertical movement at four corners. Some small mechanical presses use a cylindrical guide.

The vertical movement of the slide adjustment for adjusting the die height is performed by inserting an adjustment rod into a pin hole provided on the outer peripheral surface of the adjustment screw and manually rotating the adjustment screw directly. There is a mechanism in which the adjusting screw is rotated manually or via a worm wheel that meshes with a worm shaft that is rotated by a brake motor, an air motor, or the like. However, in any of the mechanisms, a slide adjustment screw lock mechanism that suppresses rotation of the adjustment screw caused by a gap between the screw portions to be screwed during press working after completion of the slide adjustment is not provided.

[0004]

SUMMARY OF THE INVENTION Among the above prior arts,
When multiple slides are provided without widening the pitch between slides in a mechanical press that uses square guides, the space to provide guides for adjacent slides is narrow, and the guides for each slide must have sufficient strength. Due to the difficulty, there were drawbacks such as the lower limit of the load was limited and sufficient processing accuracy could not be obtained.

In a mechanical press that guides slides up and down by a cylindrical guide, there is a drawback that a detent mechanism must be provided for each of the slides so that the slides do not rotate.

Further, at the time of press working after the completion of the slide adjustment for adjusting the position of the upper die of the mold, the adjustment screw rotates minutely due to the gap between the screw portions to be screwed, or the slide due to the gap between the screws. Changes the bottom dead center position, which affects the machining accuracy.

[0007] An object of the present invention is to eliminate these drawbacks and to improve the accuracy of slide up and down guide and the accuracy of the rotational position without increasing the pitch between slides of a plurality of slides. The effect of the gap
This is to suppress unexpected screw rotation. That is,
The slide of the mechanical press that drives the slide by the connecting rod mechanism generates a horizontal component force in addition to the force of the vertical press work load, which reduces the accuracy of the vertical movement of the slide. A multi-slide having a slide adjustment screw lock mechanism, which provides a slide guide that can prevent the slide and further presses the gap between the screw portions to be screwed to one side after the adjustment of the slide adjustment mechanism for adjusting the upper mold position is completed. To provide a mechanical press.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a slide in which a plurality of slides are integrally formed with a prism portion at an upper portion and a cylindrical portion at a lower portion. A pressure receiving guide is provided at a position facing the front and rear side surfaces of the rectangular prism portion of the slide, the slide is guided vertically and held non-rotatably, and a cylindrical guide is provided at a position facing the cylindrical portion at the lower portion of the slide. Guide the slide up and down.

Further, a female screw is provided at a lower portion of the cylindrical portion of the slide, and an adjusting screw having a male screw at an upper portion to be screwed with the female screw is screwed into the adjusting screw. A pressure receiving plate to which the upper mold of the mold is attached is provided in a cylinder fixed to the lower surface of the cylindrical portion of the slide. Pressure oil is supplied to a hydraulic chamber formed by a cylinder and a pressure receiving plate to push up the pressure receiving plate, push up an adjusting screw in contact with the pressure receiving plate, and remove a gap between a screw of a screw portion of the female screw and the male screw to one side. To suppress the relative rotation of the slide and the adjustment screw,
A slide adjusting screw lock mechanism for adjusting the position of the pressure receiving plate to which the upper mold is attached is provided.

[0010]

The prism and the cylindrical portion of the slide are guided by the pressure receiving guide and the cylindrical guide provided on the frame.
The horizontal force in the front and rear direction and the rotating force acting on the slide are received by the pressure receiving guides on the front and rear sides of the prism, and the vertical direction is guided by the pressure receiving guide and the cylindrical guide,
The parallelism, squareness and rotation required for the slide and the positional accuracy in the horizontal plane are effectively maintained.

After the slide adjustment for adjusting the position of the pressure receiving plate on which the upper die is mounted is completed, pressure oil is supplied to a hydraulic chamber formed by a cylinder provided on the lower surface of the cylindrical portion and the pressure receiving plate, and the pressure receiving plate is moved. Pushing up, thereby pushing up the adjusting screw, pressing the gap between the screw portion of the female screw and the male screw to be screwed to one side, and suppressing the rotation of the adjusting screw, the slide bottom dead center position during press working is held, Processing accuracy is stabilized.

[0012]

1, 2 and 3 show the structure of a mechanical press according to a first embodiment of the present invention. In FIG. 1, an upper end portion of a connecting rod 5 is rotatably connected to an eccentric portion 4 of a crankshaft 3 rotatably supported on an upper portion of a frame 2 of a mechanical press 1. The ball 5A at the lower end of the connecting rod 5
And the ball 5A is rotatably connected to the upper end of the slide 6.

As shown by a two-dot chain line in FIG.
Has a structure in which an upper portion is formed integrally with a prism portion 6A and a lower portion is formed as a cylindrical portion 6B.

FIG. 1 shows an intermediate portion of the frame 2 in the vertical direction.
2, as shown in FIG. 2, receiving surface guides 7, 7 fixed to a first casing 10 for vertically guiding the front and rear sides of a prism 6A of a slide 6, and a second for vertically guiding a cylindrical portion 6B.
A cylindrical guide 8 which is fitted to the casing 11 and whose lower surface is held by the retainer 12 is provided. Further, the frame 2 is provided with balance cylinders 9, 9 urged upward,
The piston rods 9A, 9A of the balance cylinders 9, 9 are connected to the upper end of the slide 6, and the weight of the slide 6 is balanced. The weight of the slide 6 includes the die height adjustment portion 6C provided at the lower end of the slide 6 and the upper die (not shown) of a die attached below the same, as in a normal press machine.

In FIG. 1, when the crankshaft 3 rotates, the center O2 of the eccentric portion 4 rotates around the center O1 of the crankshaft 3. Accordingly, the connecting rod 5 rotates back and forth around the center O3 of the ball portion 5A within the range of the angle θ. When the power of the crankshaft 3 is transmitted to the slide 6, a thrust force, which is a horizontal component in the front-rear direction, is generated in the slide 6 by the rotation angle θ of the connecting rod 5 in addition to the vertical driving force. However, since the pressure receiving guides 7, 7 fixed to the first casing 10 receive the thrust force, the transmission of power is smooth, and the accuracy required for the mechanical press can be effectively maintained.

FIG. 3 shows a multi-slide mechanical press 1 in which three slides 6 constructed as described above are arranged side by side.
Is shown. The arrangement of the pressure surface guide 7 and the cylindrical guide 8 constituting the slide guide is as shown in FIG. 2, and it is not necessary to increase the pitch between adjacent slides 6, so that the right and left dimensions of the mechanical press 1 can be reduced. I can do it. Further, since the receiving surface guide 7 guides the prism 6A of the slide 6, the rotation of the slide 6 around the central axis in the vertical direction is suppressed.

FIG. 4 shows a slide adjusting section according to a second embodiment of the present invention. In the second embodiment, the cylindrical portion of the slide in the first embodiment has an upper cylindrical portion 16B and a lower cylindrical portion which is screwed to a screw portion provided on the inner periphery with an adjusting screw 18 for fixing an external gear 17 on the lower surface. 16D and the upper cylindrical portion 16
B and the lower cylindrical portion 16D are integrated by being fastened by bolts, fitted into the second casing 11 and guided by the cylindrical guide 8 whose lower surface is held by the retainer 12, as in the first embodiment. Of course, it goes without saying that the upper cylindrical portion 16B and the lower cylindrical portion 16D may be integrated.

A cylinder 1 which is fastened to the lower surface of the lower cylindrical portion 16D by bolts and has a supply / discharge port 13A for pressure oil on the outer peripheral surface.
3, the worm shaft 14 and the worm wheel 15 that mesh with each other, the external gear 17 that meshes with the internal gear provided on the inner periphery of the worm wheel 15, and the external gear 17 adjusting screw 18. The pressure receiving plate 19 is provided inside.

At the time of press working after the slide adjustment for adjusting the position of the pressure receiving plate 19 to which the upper die is attached, the pressurized oil supply / discharge port 13A of the cylinder 13 provided on the lower surface of the lower cylindrical portion 16D is transferred to the hydraulic chamber 20. When the pressure oil is supplied, the pressure receiving plate 19 provided in the cylinder 13
By pushing up the gap between the adjusting screw 18 screwed through the screw 7 and the screw portion of the lower cylindrical portion 16D, the rotation of the adjusting screw 18 is suppressed. It goes without saying that the adjusting screw 18 and the external gear 17 may be integrally formed as an adjusting screw.

The pressure receiving plate 19 for mounting the upper die is provided.
Although not shown, the slide adjustment for adjusting the position of the worm shaft 14 is performed by rotating the worm shaft 14 manually or by a brake motor or an air motor. Also,
The structure of the upper part of the slide 16, which guides the front and rear sides of the prism 6A of the slide 16 up and down by the receiving surface guides 7, 7 fixed to the first casing 10, is the same as that of the first embodiment.

[0021]

As is apparent from the above description, according to the present invention, a prism is provided at the upper part of the slide, and a cylindrical part is provided at the lower part, and the pressure receiving guide is provided on the frame in a direction corresponding to the turning direction of the connecting rod. That is, it is provided in the front-rear direction to receive a thrust force, and the pressure receiving guide and the cylindrical guide can improve the accuracy of slide up and down guidance. That is, the combination of the pressure receiving guide and the cylindrical guide can provide a mechanical press having a slide guide that can obtain a large effect with a simple structure.

Further, by providing a slide adjusting screw lock mechanism in the die height adjusting mechanism for adjusting the position of the pressure receiving plate to which the upper die is attached, the position of the slide bottom dead center at the time of press working is maintained, and working accuracy is stabilized.

[Brief description of the drawings]

FIG. 1 shows a main part of a mechanical press in a first embodiment,
II sectional view of FIG.

FIG. 2 is a plan view of a main part of the frame in FIG. 1;

FIG. 3 is a front view of a mechanical press.

FIG. 4 is a sectional view of a slide adjusting unit according to a second embodiment.

[Explanation of symbols]

1 is a mechanical press, 2 is a frame, 3 is a crankshaft, 4 is an eccentric part, 5 is a connecting rod, 5A is a spherical part, 6 and 16 are slides, 6A is a prism, 6B is a cylindrical part, and 6C and 16C are die height adjustments. Part, 7 is a pressure receiving guide, 8 is a cylindrical guide, 9
Is a balance cylinder, 9A is a piston rod, 10 is a first casing, 11 is a second casing, 12 is a retainer, 13 is a cylinder, 13A is a pressure oil supply / discharge port, 14 is a worm shaft, 15 is a worm wheel, and 16B is a worm wheel. Upper cylindrical part, 16D is lower cylindrical part, 17 is external gear, 18 is adjusting screw, 19 is pressure receiving plate, 20 is hydraulic chamber, O1 is center of crankshaft 3, O2 is center of eccentric part 4, O3 is ball The center θ of the portion 5A is the rotation angle of the connecting rod 5.

Claims (2)

(57) [Claims] 1. A multi-slide mechanical press having a plurality of slides moved up and down via connecting rods connected to an eccentric part of a crankshaft, wherein the plurality of slides are integrally formed as a prismatic part at an upper part and a cylindrical part at a lower part. Is provided on the frame of the mechanical press, a pressure receiving guide is provided at a position facing the front and rear side surfaces of the prism portion of the slide, and a cylindrical guide is provided at a position facing the outer periphery of the cylindrical portion, and the slide is vertically moved. A multi-slide mechanical press characterized by guiding. 2. The mechanical press according to claim 1, wherein a female screw is provided at a lower portion of the cylindrical portion of the slide, and an adjusting screw having an upper male screw screwed with the female screw is screwed into the lower portion of the adjusting screw. A pressure-receiving plate for contacting the upper surface and mounting the upper mold of the mold on the lower surface is provided in a cylinder fixed to the lower surface of the cylindrical portion of the slide, and supplies pressure oil to a hydraulic chamber formed by the cylinder and the pressure-receiving plate. To raise the pressure receiving plate, push up the adjusting screw that abuts, press the gap between the threads of the screw portion of the female screw and the male screw toward one side and press it, suppress the relative rotation of the slide and the adjusting screw, and adjust the position of the pressure receiving plate. A multi-slide mechanical press comprising a slide adjusting screw lock mechanism for adjusting.